zealinux

# requirement: python-mysqldb

import MySQLdb as dbapi
import sys
import csv

QUERY = 'SELECT * FROM mydb.people;'
db = dbapi.connect(host='localhost', user='root', passwd='password', db='dbname')

zealinux

#!/bin/bash
# 
# steps taken verbatim from:
#  http://docs.aws.amazon.com/AmazonECS/latest/developerguide/docker-basics.html#install_docker
#
sudo yum update -y
sudo yum install -y docker
sudo service docker start
sudo usermod -a -G docker ec2-user
# log out and log in to pickup the added group

zealinux

from urllib2 import urlopen
code = urlopen("http://example.com/").code
if (code / 100 >= 4):
   print "Nothing there."
# via http://stackoverflow.com/questions/1966086/how-can-i-determine-if-anything-at-the-given-url-does-exist

zealinux

import numpy as np
def sigmoid(x):
  return 1.0 / (1 + np.exp(-float(x)));  

zealinux

import numpy as np

def tuple_to_dict(t):
  return dict([t])

def get_first(d):
  t = sorted(d.items())[0]
  return tuple_to_dic(t)

def combine_to_dict(keys, values):

zealinux

best simi is: 0.97

**** other image compare to base_center_vector ****
[('610703da-0eeb-42f7-99a8-f01634379847.jpg', 0.95584446),
 ('7156d573-8db5-4ab4-ab0f-cf9cb1d9aaba.jpg', 0.9364199),
 ('1b0f9271-d199-4585-99f6-b474856f94fa.jpg', 0.74257964),
 ('28c1dd5e-65ac-4b8b-887e-0ade5492da22.jpg', 0.71596545),
 ('3a53ad92-3f77-47cc-926f-3f8af1537c0d.jpg', 0.6548833),
 ('3a1c4638-762a-4ae4-b00c-dc5c71b9eb89.jpg', 0.6441053),
 ('2ea2b9a8-2fbd-495b-95d0-26781efd059a.jpg', 0.63781774),

zealinux

# 20131214
# switch to the relevant keg directory
cd /usr/local/Library/Taps/homebrew-science

brew versions opencv
# look for the version you want, eg:
# 2.4.5    git checkout ae74fe9 opencv.rb

# checkout the version you want
git checkout ae74fe9 opencv.rb

zealinux

Bash getopts usage template

#!/bin/bash -e

function usage {

	cat <<EOM
Usage: $(basename "$0") [OPTION]...

zealinux

# lib/tasks/db.rake
namespace :db do

  desc "Dumps the database to db/APP_NAME.dump"
  task :dump => :environment do
    cmd = nil
    with_config do |app, host, db, user|
      cmd = "pg_dump --host #{host} --username #{user} --verbose --clean --no-owner --no-acl --format=c #{db} > #{Rails.root}/db/#{app}.dump"
    end
    puts cmd

zealinux

linux查看httpd进程数

ps -ef | grep httpd | wc -l

查看Apache的并发请求数及其TCP连接状态

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'